Portable carton



C. F l ELDv PORTABLE CARTON April 17, 1934.

Original Filed April 16 5 l l l l l l 5 l INVENToR l Crosy 17min( BY /Z'fa L ATTORNEYS Patented Apr. 17, 1934 UNITED sizfrrfzsl PATENT ol-Flca 1,954,807 f PORTABLE cA'roN Field, Brooklyn, N. Y.,

Brooklyn, N. Y.,

assigner 'to lakice a corporation of Original application April 16, 1928, Serial No. 270,257. Divided and this application Septem ber 21, 1929, Serial N0. 394,180

2 Claims.

l'This invention relates to the art of preserving perishable substances and particularly to portable cartons and method of making the same.

rounded by a refrigerant, salt, carried Within larger outer containers.

usually crushed ice and It has also been common to pack smaller quantities of such perishable substances in .single-chamf bered cartons intended to be stored in refrigerators pending final disposition. In the former case the containers have usually been relatively large,

heavy and subject to leakage of the melting refirigerant, and in the latter case the cartons, once removed from the refrigerator',

have failed to protect their contents from melting or other deterioration.

Among the the provision objects of the quantity of thesubstance a quantity of refrigerant without danger of inter-mixture of the two materials and without liability of leakage of either from the carton. A

A further object is to provide a method whereby such cartons may be rapidly and effectively charged with refrigerant and `the refrigerant effectively sealed in place.

Such cartons, `when so charged with refrigerant,v may then be filled with any perishable substance With assurance that the latter will remain at low temperature for a relatively long period of time, regardless of where or how it may the carton may be kept be handled.

This application' is a division of my copending application Serial No. and which describes a charging the cartons 270,257, led April 16,1928, method and mechanism for with a refrigerant.

One illustrative embodiment of the invention is hereinafter described and shown in the accompanying drawing wherein:

' Figure 1 is be preserved; Figs. 2 and tainer for the manner of using the same;

Fig. 4 shows a .carton inverted on a sectional view of the preferred and the substance to substance to be preserved, and the `a mandrel and` partly filled;

Fig. 5 shows-a carton inverted, filled, sealed and in a position to drel;and,

Fig. 6 is a h be removed from the manorizontal section taken on line 6-6 form-retaining.

present invention isV of an inexpensive light carton designed to carry both a to be preserved and the flange 21 from the show a-mold for shaping a confrom the .-.hand to the contents.

of Fig. 4, showing overlapping edges 42 and43. The carton most suitable for present` purposes may be said to consist in general of an inner cup for the substance to be preserved and an outer surrounding container for holding the refrigerant. ,Preferably the refrigerant will not only sur--v round the inner cup, but also will cverlie one or both of its ends. 'K Referring to Fig. v1 which shows the preferred form of cylindrical carton C filled both with the g5 substanceto be preserved and the refrigerant all sealed and ready for delivery lto the consumer, the inner cup 20 may be made up of a single sheet of fairly light 'paper pleated to avoid the necessity of any. seam. 'Thisinner cup may be waxed or 70 otherwise treated to render it impervious and Thepcup 20 is provided at its' upper edge with a laterally extending flange 21 which is bent over and secured to theedge of an outer concentric container 22, the latter preferably being of a heavier construction. With this construction the cup 20 is completely displaced by outer container 22 by an annular space which may be filled with a refrigerant. `This completeI separation Aimproves the B0 efficiency of the carton as a means of refrigerating material in the cup 20. The outer container 22 may, for example',`be made of overlapping layers of spirally wound cardboard suitably waxed or otherwise treated to make it impervious.. Closing B5 l the lower end of the container 22 the circular disc 23 is sealed to and within the peripheral edge of, the container 22, thus forming a closed chamber 24 to contain the refrigerant.

The substance tobe preserved may be placed o directly in the cup 20, but preferably it is flrst placed in a light seamless sack 26 also made of a single sheet of paper pleated and waxed.

This sack 26 may be filled in any suitable manner. For example, it may be placed in a mold 33 (see Figs. 2 and 3) of the same size and shape as the' inner cup .20, and then filled with the substance to be preserved, the upper ared edge 2'7 being gathered in` after filling. While obviously such mold may be of any suitable nature, a particularly useful one is shown in Figs. 2 and 3 wherein the mold is shown. to comprise two complementary parts 33, 34 connected at vthe bottom by a hinge 35. When thesack 2 6 is lled to the topl of the mold the latter maybe spread apart to permit the easy removal of the filled sack. l

Handling the filled sack is facilitated bythe neck portion 27 'which does not transmltheat Further, as 'n shown in Fig. 1, it `will form a spacing means between the sack and the container cover 28, creating a dead air insulating space, and even though no refrigerant be used at that end, the carton, when packed, willstill be satisfactorily heat-excluding, the cover 28 being arranged to fit tightly upon the upper end ofthe container From the Iabove description it will be readily understood that the inner cup of the carton may belled without diiliculty by hand. If desired, the refrigerant chamber surrounding the cup 20 might also be charged by hand. Preferably, however, the introduction ofthe refrigshape of the cup 20 during the packing of the refrigerant in the annular space between the outer container 22 and cup 20. A mandrel, as shown in Figs. 4 and 5, is preferably of the expansible type. In the form shown in the drawing, the

Y mandrel comprises a hollow mandrel portion 41,

slit from top to bottom on one side to provide overlapping edges 42 and 43 (Fig. 6), and secured to a plate 44 vhingedly mounted on a table 45. For a considerable distance on both sides of the overlapping "edges 42 and 43 the mandrel is cut away from, and is free of, the plate 44 so as t-o 1 permit its contraction and expansion to faciliping the plate tate the placement, removal and replacement of cartons. The contraction. of the mandrel is effected through a toggle mechanism 46 by tipping the plate 44 and mandrel portion 41 away from the table the expansion being effected by tip- The upper end o f the mandrel is protected by a cap 47 attached to the non-expansible portion. When themandrel is tipped forwardly, as shown in Fig. 5, an empty carton may be inserted thereover, and as the mandrel is tipped back into vertical position, it expands, completely filling and shaping the cup 20. This operation, while providing an easy release after filling, affords protection to the'more fragile cup 20 during the charging of the refrigerant.

After an empty carton the mandrel 41, y it is preferably lled with crushed ice and salt, the into the carton simultaneously but 1n separate 44 about its hinge toward table 45.

has been inserted overA salt and ice` mixture (see'Figs. 1, 4 and 5). With this method of lling the container 22, there is provided a temperature gradient through the .exists at the exterior of the mixture adjacent` the container 22. Such a temperature gradient increases the efficiency of the packed carton by maintaining the cJldest part of the refrigerant awayfrom the atmosphere and immediately adjacent the substance being refrigerated.

After the carton has been lled, as shown in Fig. 5, it is sealed with a cover 23 and then removed from the mandrel 41 by tipping the carton, mandrel and plate 44 to contract the mandrel. For a more detailed explanation of the lling and sealing operation, as automatically carried out, see my aforementioned co-pending application Serial No. 270,257.

'I'he lledcarton is now inverted and the cup 20 filled with the substance to be refrigerated, supplied either in a container such as 26 or directly into the cup. The cover 28 is then put on, covering the cup 20 and re-enforcing the flange 21.

While the detailed description has herein beenconned to certain illustrative embodiments it may be made relative is obvious that changes thereto without departing from the spirit of the appended claims.

I claim as my invention:

1. A carton for perishable substances comprising a. cup-like inner container provided at its rim with an outwardly projecting flange, an outer surrounding container longer than said inner container, said outer container being joined at its rim to said flange at a substantial distance from the rim of the inner container to form throughout the length of the inner container an annular space to hold a refrigerant mixture of salt and ice, caps closing both ends of said outer container, and a third container fitting within the inner `container to hold the perishable substance, said third container being closed at its top when lled and the top being maintained at an interval from the top cap of the carton. 2. A light portable packagecomprising an inner container of impervious sheet fibrous material `filled with a perishable substance, an outer surrounding container of impervious sheet flbrous material forming a' chamber about the sides of and beyond the end of said inner container and having its chamber charged with a refrigerant mixture of salt and ice, the greater proportion of salt'being contained in that portion of the 'mixture disposed adjacent the inner container.

CROSBY FIELD. 

